Honestly, I'd probably say your rotation could be off a little if it is going down 500 or so dps. Right now your above the expertise cap and pretty high on hit. I'd try to get some better pieces. You can grab an old spreadsheet from ej forums for dps and plug in your gear/spec and see what u should have for raid dps. One other thing is. I'd change glyph of battle to commanding since it looks like your the imp commanding guy for the raid.